Dynamo.



V. C. GOODRIDGE.

DYNAMO.

APPLICATION FILED sEPT.2. |913.

1,212,476, 'at-ented Jan. 16, 1917.

VICTOR C. GGODRIDGE, F CHICAGO, ILLINOIS.

' DYNAMO.

A specificati on of Letters Patent. -Patented Jan. 1917.

Application filed September 2, 1913. Serial No. 787,692.

To all whom t may concern Be' it known that I, Vieron C. Goonnmon, a citizenI of the United States, and a resident of' Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in D'ynamos, of which the following, when taken in connection with i the drawing accompanying and forming a part hereof, is a specification.

Thisinvention relates to dynamos which are'used to generate what is known in the art as an alternating current.

The object of theinvention is to obtain lan alternating current dynamo which will generate a current of high frequency, without requiring dangerously high speed in the rotation' of ythe movable parts of the device Additional objects are to obtain a dynamo which will be durable, not liable to break or 'get out of order, which will not be complicated in construction, and which will' be easily understood and operated by those skilled in the art.

In the drawing referred to Figure 'l is a vertical section, on line 1-1 of Fig. 3, lviewed in the direction indicated by the arrows. Fig. 2 is a vertical section, on line 2,-2 of Fig. l, viewed in the direction indicated by the arrows; And Fig. 3 is an end elevation of the device.

A reference letter applied to designate a given part is used to indicate said part wherever the same appears.

A is the base or foundation of the device.

B, B1 are standards which are rigidly secured to the base A. B C, C1, are journal boxes on standards B,

D is a shaft ,which is rotatably mounted in journal boxes C, C.

E is a. hoiiow- Shaft which is rotatably' mounted in journal boxes C1, C1. ShaftsD and E are concentric, with shaft D' extending entirely through the shaft E, but said shafts not fitting so closely together but what they directions.

F is the armature of the device, and is rigidly secured to shaft D to revolve ftherewith. G is the .field magnet of the device, and is may freely revolve in opposite rigidly secured to shaft E, to revolve therewith.

H is a wheel or pulley which is secured to shaftD to turn therewith, and said shaft is rotated by the turning of said wheel.

I is a wheel or pulley on shaft E, to turn therewith, so that the rotation of said wheel I rotates the shaft E. 1

/ J, y' are the armature collector rings, and

K, 7c, the fieldcollector rings.

L is a brush to collector ring'J, and Z to collector-ring j.

' .M is the brush to-collector ring K and m to collector ring lo. v

NM2, are wires of the armature which extend through passage way O in shaft D and are respectively attached to the collector rings J, f.

P, p, are the wires to collector rings K, Ze, respectively.

-Q is an exciting battery, (primary or storage), or dynamo, which is'installed in the field magnet circuit, in the ordinary way of installing the'iield exciting means. The current generated by this dynamo is conveyed on the wires R, r, which are respectively attached tothe brushes M, fm., to the place where said current is utilized.

To operate the device the, shaft D is rotated in one direction 'and the shaft E is rotated inl the opposite direction. The frequency of the current generated is produced in the same way as in an ordinary dynamo; but withthe field magnet turning at a given speed and the armature at the same speed the frequency of the current is doubled in this device'over what it is wih the armature at rest as in other alternatin .d namos.

'shaft and another member of the dynamo electric machine secured to the inner shaft,

and collecting devices for said members mounted on said shafts, at least one of which is located between the arms of said U-shaped stand ard.

vieron c. GooDRiDen.

In the presenceofc J. SAMrsoN Goonnfnen, D. 4E. GooDRiDGn. 

